Abrading material and mounting therefor.



PATENTED Nov. 8, 1904.

R. GARDNER.

ABR ADING MATERIAL AND MOUNTING THEREFOR.

APPLICATION FILED JUNE 30, 1902.

30 MODEL.

UNITED STATES Patented November 8, 1904.

PATENT EEicE.

ABRADING MATERIAL AND MOUNTING THEREFOR.

SPECIFICATION forming part of Letters Patent N 0. 774,513, datedNovember 8, 1904.

Application filed June 30, 1902- Serial No. 113,724. (No model.)

To all whom, it may concern:

Be it known that I, ROLAND GARDNER, a subject of the King of England,and a resident of Cleveland, in the county of Ouyahoga and State ofOhio, have invented certainnew and useful Improvements in AbradingMaterials and Mountings Therefor, of which the following is aspecification.

My invention relates to improvements in abrading materials and mountingstherefor.

In the polishing of hard and gritty surfaces, such as are provided bystone, &c., it is essential that the polishing wheel or carrier have itsabrading-surface of such form as will insure a smooth polished surfaceon the article operated upon. To provide this, certain essentialfeatures are necessary. Among these are to be found the prevention ofheating of the article, as far as this is possible; to provide anabrading-surface which will wear evenly, and to provide means wherebythe residuum formed by the abrading action will either be removed fromthe surface being polished or so distributed that it will be fed to thepart being subjected to the abrading action without liability of itsdamaging the surface being polished.

The object of my invention is therefore to provide an abrading-surfacein which the operating-face will wear in an even manner, in whichheating of the article will be prevented to a great extent, and in whichthe residuum will be evenly distributed over the operatingsurface or beremoved therefrom.

A further object is to provide a surface composed of sections, eachsection having its operating-face arranged in such manner as to cause aneven wear of the face regardless of the difference in speed of movementof its different parts.

A further object is to provide an abradingsurface formed of sections,each of which is adjustable relative to the remaining sections and whichis held securely against retrograde movement.

A further object is to provide a structure which is easily operated,durable in construc tion, and which can be made at moderate cost.

To these and other ends, the nature of which will be readily understoodas the invention is hereinafter described, said invention consists inthe improved construction and combination of parts hereinafter fullydescribed, and particularly pointed out in the appended claims.

In the drawings, in which similar reference characters indicate similarparts, Figure 1 is a plan View of a polishing-wheel constructed inaccordance with my invention, a portion of the top surface being brokenaway. Fig. 2 is a fragmentary bottom plan view. Fig. 3 is a sideelevation, parts being broken away, on the line 3 3 of Fig. 1; and Fig.4 is a detail of one of the abrading-sections.

The carrier or casing B is shown in the drawings in the form of a wheeland having a hub b, to the upper end of which the usual lugs a a aresecured or formed integraltherewith, the inner and outer bands 0 and (Z,respectively, the latter being connected by the radially-extending wingsc, the inner band being formed integral or secured to the hub b. Asshown, each wing c has a horizontallyextending portion 6 for a purposehereinafter described.

Intermediate each wing e are arranged intermediate wingsor webs m, whichextend tangentially to an inner circle, thereby providing a surfacewhich converges relatively to the face of the wing e, the space betweenthe two opposing faces of the wings a and m below the portion 6 formingan opening to receive the abrading-section hereinafter described. Theportion of the carrier between the wings a and m which is not under theportion 0 is formed withopenings g, preferably arranged with slopingsides, as shown. It will thus be seen that l have provided alternatingopenings or slots for the abrading-sections, which slots are designatedas f and the openings g. The side of the wing at facing the slot f ispreferably'inclined, as shown in Fig. 3.

The abrading-sections A are formed as shown in Fig. 4. Each section hastwo parallel sides a, and two sides a, which converge. The lower side a"forms the operating-face. The sections are'made' of any suitable orpreferred material.

The sections are secured 1n position by means of wedges C, each having ascrewthreaded stem 71, which passes through an opening in the portion c,one side of the wedge being straight and contacting with the section A,the other being inclined and abutting against the inclined side of thewing at. The wedge is held in position by means of a nut "Z". By thisconstruction the section A is held clamped laterally between the face 0of the wing e and the straight face of the wedge C. To preventretrograde movement of the section and to adjust its face relative tothe faces of the remaining sections, suitable set-screws D are extendedthrough the portion 6". By this securing means practically the entiresection can be used, the securing devices holding the sections secureuntil they have become worn to a slight thickness. It will be obviousthat as each section is independently secured and adjusted the structureneed not have sections of equal thickness, worn ones being replaced bynew ones when necessary without disturbing any of theremaining sectionsand with but little trouble and expense.

While I have above described the carrier and the general structure, themain feature of my invention consists in the form of the sections andtheir relative arrangement in the carrier.

As above pointed out, each section has its sides a converging, givingthe section in horizontal section a wedge shape. These sections beingsecured in position with the larger end toward the periphery of thecarrier, it will be readily understood that the wider ends of thesection, which move more rapidly than the inner ends and also operateagainst a greater extent of surface, are subjected to greater wear thanthe inner ends. Were both ends of the same thickness the greater actionof the outer end would become worn more rapidly than the inner end, andthereby provide an uneven abrading-surface. By giving the section theshape shown and described, however, this is obviated, as the increasedcontacting surface prevents such uneven wear.

In arranging the sections the operatingfaces extend radially and arespaced, the sections forming a relatively small portion of the surfaceof the carrier. This construction provides relatively large spaces orconduits between adjacent sections, these conduits leading from thecenter to the outer circumference. These conduits receive the waterthrough the openings 9, by means of which the article is not only keptcool, but which also aids in the polishing, and in addition permit of acirculation of air through all parts of the structure, aiding in keepingthe article cool. Furthermore, it will be readily understood that theforward edge of the rotating sections being radial, or substantially so,Will tend to move the residuum resulting from the abrading actionoutward toward the end of the section, thereby distributing it andgradually forcing it out from the path of the abrading-surface.

Having thus described my invention, What 1 claim as new is- 1. Anabrading-surface comprising a series of spaced independently-removableabradingsections extending radially, each section having an increasedoperating face toward its outer end, and means for limiting the retrograde movement of each of the sections.

2. An abrading-surface comprising a series of spacedindependently-removable abradingsections, extending radially, eachsection having an increased operating face toward its outer end, andmeans for adjusting the operating-face of each section relatively to theremaining sections, said means forming a support against retrogrademovement of the sections.

3. In an abrading-tool, the combination with a carrier, of a series ofspaced abrading-sections extending radially, each section having anincreased operating-face toward its outer end, and independent spacesformed between each section, openings being formed in the carrierleading to said spaces.

4. In an abrading-tool, the combination with a carrier, of a series ofspaced abrading-sections extending radially, each section having itsoperating-face of wedge shape, means for limiting the retrogrademovement of each of the sections, and independent adjustable securingdevices for retaining said sections in operative position.

5. In an abrading-tool, the combination with a carrier, of a series ofspaced abrading-sections extending radially, each section having itsoperating-face of wedge shape, means for limiting the retrogrademovement of each of the sections and an adjustable wedge for eachsection, whereby the sections will be held in operative position.

6. In an abrading-tool, the combination with a carrier, of a series ofspaced abrading-sections extending radially, each section having itsoperating-face of Wedge shape, means for adj ustably moving the sectionsindependently, said means forming the support against a retrogrademovement of the sections, and an independent adjustable wedge forretaining each section in its adjusted position.

Signed at Cleveland, Ohio, this 29th day of May, 1902.

ROLAND GARDNER.

Witnesses:

BERNH. F. EIBLER, DORA HECKLER.

